Device for treating a fiber web

摘要

A device for treating a fiber web, especially a device for applying treatment substance for treating a moving fiber web, has at least one nozzle (10) comprising a channel (11) for the treatment substance, a frame part (12), a tip or end (13) of the nozzle (10) and a treatment substance opening (14) providing a treatment substance spray, which nozzle (10) has a tip groove area (20) adjacent to the treatment substance opening (14). The nozzle (10) has at least one opening next to or at the tip groove area (20) for providing a cleaning fluid flow comprising gas and/or liquid to the tip groove area.

主权项

1. A device for treating a fiber web with a treatment substance comprising:
at least one nozzle having a tip or end having an outwardly facing tip surface located on an exterior of the nozzle, and a frame, portions of the frame forming a channel connected to a source of fiber web treatment substance; wherein the at least one nozzle has portions forming a fiber web treatment substance opening for forming a spray of fiber web treatment substance positioned at the end or tip of the nozzle, and connected to the channel to receive fiber web treatment substance, the channel extending from the source of fiber web treatment substance to the fiber web treatment substance opening in a first direction; wherein the at least one nozzle has a groove forming a groove area adjacent to the treatment substance opening, the groove extending transverse to the channel and downstream of the treatment substance opening, wherein the groove is adjacent the tip surface; wherein the at least one nozzle has portions forming a first cleaning opening and a second cleaning opening next to or at the groove and connected to a source of cleaning fluid by parallel cleaning fluid channels which extend to a plenum in the frame which communicates with a second channel which extends to a source of cleaning fluid so as to supply a cleaning fluid flow to clean the groove area, wherein the at least one cleaning opening is located upstream in the first direction from the groove, and discharges to the tip surface; and wherein the nozzle tip groove extends between a first end and a second end, and wherein the first cleaning opening is adjacent the tip surface near the first end of the groove and the second cleaning opening is adjacent the tip surface near the second end of the groove, the first and second cleaning openings coinciding with the first and second ends of the groove.